EP0835050A1 - Methode und vorrichtung zur bestückung elektronischer bauteile - Google Patents
Methode und vorrichtung zur bestückung elektronischer bauteile Download PDFInfo
- Publication number
- EP0835050A1 EP0835050A1 EP96916322A EP96916322A EP0835050A1 EP 0835050 A1 EP0835050 A1 EP 0835050A1 EP 96916322 A EP96916322 A EP 96916322A EP 96916322 A EP96916322 A EP 96916322A EP 0835050 A1 EP0835050 A1 EP 0835050A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- electronic components
- laser
- mounting
- electronic
- recited
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 36
- 238000012545 processing Methods 0.000 claims abstract description 10
- 238000009966 trimming Methods 0.000 claims description 42
- 239000000463 material Substances 0.000 claims description 8
- 230000010355 oscillation Effects 0.000 claims description 7
- 239000000523 sample Substances 0.000 claims description 6
- 239000003990 capacitor Substances 0.000 claims description 2
- 238000010276 construction Methods 0.000 description 3
- 238000007796 conventional method Methods 0.000 description 2
- 230000033001 locomotion Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000002161 passivation Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C17/00—Apparatus or processes specially adapted for manufacturing resistors
- H01C17/22—Apparatus or processes specially adapted for manufacturing resistors adapted for trimming
- H01C17/24—Apparatus or processes specially adapted for manufacturing resistors adapted for trimming by removing or adding resistive material
- H01C17/242—Apparatus or processes specially adapted for manufacturing resistors adapted for trimming by removing or adding resistive material by laser
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/351—Working by laser beam, e.g. welding, cutting or boring for trimming or tuning of electrical components
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K13/00—Apparatus or processes specially adapted for manufacturing or adjusting assemblages of electric components
- H05K13/08—Monitoring manufacture of assemblages
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/49117—Conductor or circuit manufacturing
- Y10T29/49124—On flat or curved insulated base, e.g., printed circuit, etc.
- Y10T29/4913—Assembling to base an electrical component, e.g., capacitor, etc.
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/49117—Conductor or circuit manufacturing
- Y10T29/49124—On flat or curved insulated base, e.g., printed circuit, etc.
- Y10T29/4913—Assembling to base an electrical component, e.g., capacitor, etc.
- Y10T29/49131—Assembling to base an electrical component, e.g., capacitor, etc. by utilizing optical sighting device
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/53—Means to assemble or disassemble
- Y10T29/53087—Means to assemble or disassemble with signal, scale, illuminator, or optical viewer
- Y10T29/53091—Means to assemble or disassemble with signal, scale, illuminator, or optical viewer for work-holder for assembly or disassembly
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/53—Means to assemble or disassemble
- Y10T29/5313—Means to assemble electrical device
- Y10T29/53174—Means to fasten electrical component to wiring board, base, or substrate
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/53—Means to assemble or disassemble
- Y10T29/5313—Means to assemble electrical device
- Y10T29/53174—Means to fasten electrical component to wiring board, base, or substrate
- Y10T29/53178—Chip component
Definitions
- This invention relates to a method of automatically mounting electronic components at predetermined positions of an electronic circuit board and an apparatus therefor.
- an orthogonal robot 31 moves a mounting head 32 to an arbitrary position in x and y directions.
- a suction nozzle 33 On the tip of the mounting head 32 is provided a suction nozzle 33 which can be moved up and down.
- a chuck may be used in place of the suction nozzle 33.
- a circuit board holder 34 holds at a predetermined position an electronic circuit board 35 supplied from outside the apparatus.
- An electronic components holding unit 36 stores electronic components to be mounted on the electronic circuit board 35.
- On the electronic components holding unit 36 a plurality of electronic component supplying cassettes 37 is arranged in a line.
- the mounting head 32 when an electronic component is to be mounted, the mounting head 32 first moves to the electronic components holding unit 36, picks up an electronic component from an preferable electronic component supplying cassette 37 on the electronic components holding unit 36 by means of the suction nozzle 33; subsequently the mounting head 32 moves to the circuit board holder 34 and mounts the electronic component at a predetermined position on the pre-positioned electronic circuit board 35.
- the present invention addresses the problems associated with the conventional method and provides a method and apparatus of electronic components mounting with which the number of electronic component supplying cassettes to be arranged on the electronic components holding unit can be reduced to less than the number of types of components thus decreasing the equipment cost and the management cost of the electronic component supplying cassettes.
- the electronic components mounting method in accordance with the present invention consists of a mounting process in which an electronic component is picked up from the electronic components holding unit and is mounted on an electronic circuit board, and a processing process to trim the electronic component to a preferable characteristic value within the mounting process.
- an electronic component is trimmed by a laser beam while its characteristic value is being measured or while its trimming position is being observed by an image recognition device.
- the electronic components mounting apparatus in accordance with the present invention comprises an electronic components holding unit which stores electronic components, a circuit board holder to hold an electronic circuit board, a mounting head which picks up an electronic component and mounts it at a predetermined position on the electronic circuit board, and a laser trimming unit to trim the electronic component until a preferable characteristic value is obtained.
- the laser trimming unit is provided with a measuring means to measure the characteristic values of electronic components, a laser oscillation means, a laser scanning means to change the position of laser beam irradiation, an image pick up means to pick up the image of electronic components, and a control unit to control the position of laser beam irradiation based on the picked up image.
- the electronic components holding unit has a plurality of electronic component supplying cassettes arranged in a line, and the laser trimming unit is so provided that it can be moved to the upper part of the electronic components holding unit in the direction along which the electronic component supplying cassettes are arranged.
- FIG. 1 to 3 an exemplary embodiment of the electronic components mounting apparatus in accordance with the present invention will be explained in the following.
- an orthogonal robot 1 supports a mounting head 2 in such a way that it can move in the x and y directions.
- a suction nozzle 3 which sucks and holds an electronic component is provided in such a way that it can be moved up and down.
- a circuit board holder 4 holds at a predetermined position an electronic circuit board 5 supplied from outside of the apparatus after positioning it.
- An electronic components holding unit 6 has a plurality of electronic component supplying cassettes 7 arranged in a line in the X direction in such a way that any one of them can be detached.
- a laser trimming head 8 is supported by a positioning unit 9 in such a way that it can move in the x direction along the upper part of the electronic components holding unit 6.
- An electronic component 10 is stored in one of the electronic component supplying cassettes 7 and is of a type such as a laser trimmable chip resistor of which the characteristic value can be changed by laser trimming.
- the laser trimming head 8 comprises a laser oscillation means 11 having laser irradiation on-off function, a mirror 12, a laser focus adjusting means 13, a half mirror 14, a video camera 15, an X-axis scanning mirror 16, a Y-axis scanning mirror 17, and a lens 18.
- a control unit 21 controls laser oscillation, switching on and off of laser irradiation, laser focus adjustment, X-axis scanning mirror drive, Y-axis scanning mirror drive, probe motion, measurement means, and image processing, and has a memory unit, an arithmetic logic unit, and a data input-output unit.
- a supplied electronic circuit board 5 is positioned and held on the circuit board holder 4, and the laser trimming head 8 is moved to above the electronic component 10 at the component supplying port 7a of the electronic component supplying cassette 7.
- the electronic component 10 is a trimmable resistor 10d as shown in Fig. 4 made by coating resistive material 10b on an alumina substrate 10a and providing electrodes 10c at both ends.
- the dimension of the trimmable resistor 10d is 3.2 mm in length, 1.6 mm in width, and 0.6 mm in thickness while its initial resistance is 1 kohm.
- Optimum condition for trimming with a laser beam of 1.06 mm wavelength is a laser spot diameter of 0.05 mm at the surface of the resistor, total irradiation energy of 1.2 watts, and laser scanning speed of 10 mm/sec.
- the trimmable resistor 10d can be of a type in which surface of the resistive material 10b is provided with glass passivation.
- a surface image of the trimmable resistor is picked up with the video camera 15 incorporated in the laser trimming unit, and the contour of the resistive material 10b is extracted from the recognized image of the trimmable resistor 10d. Then after disposing the trimmable resistor 10d on the component supplying port 7a, the slant of the center line of the trimming groove on the resistive material 10b is calculated. Taking this slant of the trimming groove into account, the starting position 8a of laser irradiation for trimming off the resistive material 10b (or for cutting a trimming groove) and the path for laser scanning are determined.
- the focusing position of laser irradiation is set by the laser focus adjusting means 13 so that the laser irradiation focuses on the surface of the electronic component 10.
- the width 8b of the trimming groove is determined.
- the probes 19 provided on the laser trimming head are made in contact with the electrodes of the electronic component 10 and its characteristic value such as resistance in the case of the trimmable resistor 10d is measured. Comparing the measured result with the preset resistance laser irradiation is started from the laser irradiation starting point 8a. In this case the preset resistance value is 3.9 kohm +/- 0.5%.
- the resistance value of the trimmable resistor 10d continues to be measured, the laser beam moves along the laser scanning path, and cuts a trimming groove on the resistive material 10b.
- the resistance value of the trimmable resistor 10d reaches the preset value of 3.9 kohm, laser irradiation is terminated.
- the trimmed component is sucked by the suction nozzle 3 from the component supplying port 7a and mounted on the electronic circuit board 5.
- a next trimmable resistor is then laser trimmed until a preset resistance value is obtained, and mounted on the electronic circuit board 5.
- a preset resistance value is obtained, and mounted on the electronic circuit board 5.
- more than one values can be preset, it is possible to supply electronic components having different characteristic values from a single electronic components holding unit 6 . Mounting of electronic components is completed by repeating this process.
- an electronic component 10 is laser trimmed to an preferable characteristic value in the process of mounting the electronic component 10 from the electronic components holding unit 6 onto an electronic circuit board 5, the number of electronic component supplying cassettes 7 to be arranged on the electronic components holding unit 6 can be reduced.
- the resistance value can be changed up to several tens of times the initial value thereby allowing to greatly reduce the number of the electronic component supplying cassettes 7.
- the capacitance or the reactance value can be changed by trimming the electrodes or the leads by laser irradiation.
- the electronic components mounting apparatus in accordance with the present invention is provided with a laser trimming unit to trim electronic components to preferable characteristic values
- the above method of mounting can be realized in such a way that the electronic components can be trimmed to preferable characteristic values by laser trimming within the mounting process.
- the laser trimming unit by providing on the laser trimming unit a characteristic value measuring means, a laser oscillation means, and a laser scanning means, it is possible to laser trim electronic components while their characteristic values are being measured; and by controlling the path of laser irradiation based on the image recognized by an image pick up means, it is possible to perform trimming without the fear of mistrimming and with high reliability.
- the laser trimming head on the upper part of the electronic components holding unit in such a way that it can move in the direction of the arrangement of the electronic component supplying cassettes, it is possible to change the characteristic value of an electronic component to be mounted while another electronic component is being mounted by the mounting head thereby not sacrificing the productivity.
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Plasma & Fusion (AREA)
- Operations Research (AREA)
- Mechanical Engineering (AREA)
- Supply And Installment Of Electrical Components (AREA)
- Laser Beam Processing (AREA)
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP146128/95 | 1995-06-13 | ||
JP14612895A JP3552791B2 (ja) | 1995-06-13 | 1995-06-13 | 電子部品実装方法及び装置 |
JP14612895 | 1995-06-13 | ||
PCT/JP1996/001529 WO1996042189A1 (fr) | 1995-06-13 | 1996-06-06 | Procede et dispositif de montage de pieces electroniques |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0835050A1 true EP0835050A1 (de) | 1998-04-08 |
EP0835050A4 EP0835050A4 (de) | 1998-09-23 |
EP0835050B1 EP0835050B1 (de) | 2000-11-08 |
Family
ID=15400786
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP96916322A Expired - Lifetime EP0835050B1 (de) | 1995-06-13 | 1996-06-06 | Methode und vorrichtung zur bestückung elektronischer bauteile |
Country Status (5)
Country | Link |
---|---|
US (1) | US6256876B1 (de) |
EP (1) | EP0835050B1 (de) |
JP (1) | JP3552791B2 (de) |
DE (1) | DE69610919T2 (de) |
WO (1) | WO1996042189A1 (de) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1282350A1 (de) * | 2001-07-20 | 2003-02-05 | Sanyo Electric Co., Ltd. | Einrichtung zur Montage elektronischer Bauteile |
US6792674B2 (en) | 2000-04-28 | 2004-09-21 | Hitachi High-Tech Instruments Company, Ltd. | Apparatus for mounting electronic components |
EP3203823A4 (de) * | 2014-09-30 | 2017-10-18 | Fuji Machine Mfg. Co., Ltd. | Komponentenmontagevorrichtung |
CN111465308A (zh) * | 2020-04-13 | 2020-07-28 | 温州职业技术学院 | 预制电路基板组装中心 |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1255284A1 (de) * | 2000-07-19 | 2002-11-06 | Ibiden Co., Ltd. | Keramischer heizkörper für die bearbeitung bzw. das testen von halbleitern |
EP1304729A1 (de) * | 2000-07-19 | 2003-04-23 | Ibiden Co., Ltd. | Keramikheizer für halbleiterfertigungs und test, seine herstellungsmethode und productionssystem dafür |
US20040035846A1 (en) * | 2000-09-13 | 2004-02-26 | Yasuji Hiramatsu | Ceramic heater for semiconductor manufacturing and inspecting equipment |
US6875950B2 (en) * | 2002-03-22 | 2005-04-05 | Gsi Lumonics Corporation | Automated laser trimming of resistors |
WO2004049401A2 (en) * | 2002-11-21 | 2004-06-10 | Sanmina-Sci Corporation | Laser trimming of resistors |
US6972391B2 (en) * | 2002-11-21 | 2005-12-06 | Hadco Santa Clara, Inc. | Laser trimming of annular passive components |
US7297896B2 (en) * | 2002-11-21 | 2007-11-20 | Hadco Santa Clara, Inc. | Laser trimming of resistors |
US7059195B1 (en) * | 2004-12-02 | 2006-06-13 | Honeywell International Inc. | Disposable and trimmable wireless pressure sensor for medical applications |
NL1029247C2 (nl) * | 2005-06-14 | 2006-12-18 | Assembleon Nv | Werkwijze voor het instellen van ten minste een optionele instelling van een verwerkingseigenschap van de componentplaatsingsinrichting alsmede een dergelijke componentplaatsingsinrichting en elektronische sleutel. |
JP4962635B1 (ja) * | 2011-03-15 | 2012-06-27 | オムロン株式会社 | 光半導体パッケージおよび光半導体モジュールならびにこれらの製造方法 |
CN102509600A (zh) * | 2011-10-31 | 2012-06-20 | 上海交通大学 | 直滑式导塑电位器激光修刻机及修刻方法 |
JP2013115229A (ja) * | 2011-11-29 | 2013-06-10 | Panasonic Corp | 部品実装方法及び部品実装システム |
EP3307046B1 (de) * | 2015-06-03 | 2021-01-13 | FUJI Corporation | Komponentenmontagemaschine |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4998207A (en) * | 1988-02-01 | 1991-03-05 | Cooper Industries, Inc. | Method of manufacture of circuit boards |
US5166492A (en) * | 1991-03-27 | 1992-11-24 | Motorola, Inc. | Laser power correlation system |
WO1993024945A2 (en) * | 1992-05-28 | 1993-12-09 | Digital Equipment Corporation | Process and apparatus for sequencing and trimming components to be mounted on a pcb |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5950503A (ja) | 1982-09-16 | 1984-03-23 | 松下電器産業株式会社 | 電気回路調整装置 |
JPS60175445A (ja) | 1984-02-21 | 1985-09-09 | Matsushita Electric Ind Co Ltd | 電子回路の調整方法 |
US4573262A (en) * | 1984-05-11 | 1986-03-04 | Amp Incorporated | Apparatus for force fitting components into a workpiece |
JP2803221B2 (ja) * | 1989-09-19 | 1998-09-24 | 松下電器産業株式会社 | Ic実装装置及びその方法 |
US5003254A (en) * | 1989-11-02 | 1991-03-26 | Huntron, Inc. | Multi-axis universal circuit board test fixture |
US5209131A (en) * | 1989-11-03 | 1993-05-11 | Rank Taylor Hobson | Metrology |
JP3114034B2 (ja) * | 1992-06-05 | 2000-12-04 | ヤマハ発動機株式会社 | 部品実装方法及び部品実装装置 |
US5443534A (en) * | 1992-07-21 | 1995-08-22 | Vlt Corporation | Providing electronic components for circuity assembly |
BE1009814A5 (nl) * | 1995-11-06 | 1997-08-05 | Framatome Connectors Belgium | Werkwijze en inrichting voor het aanbrengen van elektronische onderdelen in een plaat met gedrukte schakelingen. |
-
1995
- 1995-06-13 JP JP14612895A patent/JP3552791B2/ja not_active Expired - Fee Related
-
1996
- 1996-06-06 DE DE69610919T patent/DE69610919T2/de not_active Expired - Fee Related
- 1996-06-06 EP EP96916322A patent/EP0835050B1/de not_active Expired - Lifetime
- 1996-06-06 WO PCT/JP1996/001529 patent/WO1996042189A1/ja active IP Right Grant
- 1996-06-06 US US08/973,094 patent/US6256876B1/en not_active Expired - Fee Related
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4998207A (en) * | 1988-02-01 | 1991-03-05 | Cooper Industries, Inc. | Method of manufacture of circuit boards |
US5166492A (en) * | 1991-03-27 | 1992-11-24 | Motorola, Inc. | Laser power correlation system |
WO1993024945A2 (en) * | 1992-05-28 | 1993-12-09 | Digital Equipment Corporation | Process and apparatus for sequencing and trimming components to be mounted on a pcb |
Non-Patent Citations (1)
Title |
---|
See also references of WO9642189A1 * |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6792674B2 (en) | 2000-04-28 | 2004-09-21 | Hitachi High-Tech Instruments Company, Ltd. | Apparatus for mounting electronic components |
EP1282350A1 (de) * | 2001-07-20 | 2003-02-05 | Sanyo Electric Co., Ltd. | Einrichtung zur Montage elektronischer Bauteile |
EP3203823A4 (de) * | 2014-09-30 | 2017-10-18 | Fuji Machine Mfg. Co., Ltd. | Komponentenmontagevorrichtung |
CN111465308A (zh) * | 2020-04-13 | 2020-07-28 | 温州职业技术学院 | 预制电路基板组装中心 |
Also Published As
Publication number | Publication date |
---|---|
WO1996042189A1 (fr) | 1996-12-27 |
DE69610919D1 (de) | 2000-12-14 |
JP3552791B2 (ja) | 2004-08-11 |
US6256876B1 (en) | 2001-07-10 |
EP0835050A4 (de) | 1998-09-23 |
JPH08340195A (ja) | 1996-12-24 |
EP0835050B1 (de) | 2000-11-08 |
DE69610919T2 (de) | 2001-03-15 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 19971211 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): DE GB |
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A4 | Supplementary search report drawn up and despatched |
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